I kinda skimmed this article but noticed it seemed to depend on presenting "understandable" examples of homelessness, but shouldn't every example be understanda

I kinda skimmed this article but noticed it seemed to depend on presenting "understandable" examples of homelessness, but shouldn't every example be understandable to the extent that there is a reason for everything? Why do people want to make exceptions? To justify ignoring the plights of others in a world where we cannot survive without the cooperation of others?